Lighting fixture backplate



FIG. 1 is a right side elevational view of the lighting fixture backplate in accordance with our design, illustrated in an environment of a lamp;

FIG. 2 is a top plan view of the lighting fixture backplate in accordance with our design;

FIG. 3 is a front elevational view of the lighting fixture backplate in accordance with our design;

FIG. 4 is a left side elevational view of the lighting fixture backplate in accordance with our design;

FIG. 5 is a rear side elevational view of the lighting fixture backplate in accordance with our design; and,

FIG. 6 is a bottom plan view of the lighting fixture backplate in accordance with our design.

The broken lines show the environment in which the article is used and are not considered part of the design claimed. 

The ornamental design for the lighting fixture backplate, as shown and described. 